With respect to their biology, the European Micropezidae can be divided in three groups. Species of Micropeza have phytophagous larvae feeding in the root nodules of leguminous plants and are associated with open habitats; species of Rainieria develop in the rotting wood of deciduous trees and are restricted to old forests; the majority of the other species have saprophagous larvae living in decayed vegetation, old manure or fungi and their adults usually prefer humid forests along river and creeks. Adult Micropezidae prey on small insects and other invertebrates and can be found on flowers, leaves, rotting fruit, excrement, etc.